# How do you add 15 percent to a number on a calculator?

Calculate: tips, sales price, percent off, discounted price, price with sales tax, etc.Start Value%ofStartValueEnd Value%=(Enter values into the blue boxes. Answer will appear in t

Calculate: tips, sales price, percent off, discounted price, price with sales tax, etc.

Start Value%ofStartValueEnd Value%=

(Enter values into the blue boxes. Answer will appear in the black box.)

Answers are rounded to 7 decimal places.

## Examples

Example 1:

Your restaurant bill is $56.47 and you want to leave a 15% tip.

How much is the tip?

How much is the total amount of the bill with the tip?

Start Value% of Start ValueEnd Value56.47+15%64.94

The amount of the tip is: 15% of $56.47 = $8.47 (which will be displayed under the % of Start Value box in the calculator)

The total restaurant bill plus the tip is: $56.47 + $8.47 = $64.94

Click to show this example in the calculator above.

Example 2:

You have a 25 percent off coupon. The item you want to buy is $129.99

How much money will the coupon save you?

What is the cost of the item after using the coupon?

Start Value% of Start ValueEnd Value129.99-25%97.49

The amount you will save is: 25% of $129.99 = $32.50 (which will be displayed under the % of Start Value box in the calculator)

The cost of the item after using the coupon is: $129.99 - $32.50 = $97.49

Click to show this example in the calculator above.

Example 3:

The sales tax rate is 8%

An item costs $49.99

What is the amount of sales tax?

What is the total cost of the item with sales tax.

Start Value% of Start ValueEnd Value49.99+8%53.99

The amount of sales tax is: 8% of $49.99 = $4.00 (which will be displayed under the % of Start Value box in the calculator)

The total cost with tax is: $49.99 + $4.00 = $53.99

Click to show this example in the calculator above.